Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 420
d in accordance with the datafurnished. These are illustrated in Fig. 194. We will takethose shown in D and E. Let A, B, C; A, B, C, be the projections of the three giyenspheres. TANGENT PLANES AND SOLIDS 399 If we assume two enveloping cones, tangential to each paiiof spheres, the intersection of… … Fig. 193. Draw a line from a, the centre of plan A, to e, and assumethis to be a new ground line. Draw the projectors aa, ee, andmake the length of aa equal to the height of a above XY, alsothe length of ee equal to the height of e above XY. With a as centre, draw a circle equal to A. Draw…
Geometrical drawing
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